At the end of Season 2, when the Greene family farm burned, the group was split up but they quickly found their way back to each other. Unfortunately, comic book writer/executive producer Robert Kirkman told Entertainment Weekly Season 4 isn’t going to provide the same easy fire drill set-up.

“We definitely have a lot of individual stories and I would not expect the group to be getting reunited as quickly as they did at the end of Season 2. Or possibly ever,” he said. “So there’s definitely a lot of unknowns going into the back half of this season. We’ll just have to see if they come together It’s entirely possible that there will be some parts of that group that just don’t quite make it back.”

Bah!

Vulture talked to showrunner Scott Gimple and suggested the back half of Season 4 might have more character-driven episodes since everyone is split into mini groups, so it’s easy to focus on a few people at a time.

“I was planning to be much more oblique about all this stuff, but yes, the survivors are scattered at the end of this season, and that isn’t going to be remedied immediately, so you might just be very right. [...] Also, there are some unusual structures coming up, too. In Episode 10 — I know it’s a structure that must have been done on television before but I can’t remember off the top of my head when it’s been done, and I’m sure someone will immediately point out to me that some of my favorite shows have done it — but Episode 10 has a really cool structure that I’m really excited to put in front of people. This second half of the season in and of itself is so wildly different from the first eight in every way: in its environment, in its structure, in the roll call.”

We’ve already heard a little bit about that Episode 10 from the director herself, Tricia Brock. She said that ep will feature four different storylines and "some of the oddest couplings of groups you've seen" on the show. So maybe Episode 9 will be fairly Grimes-centric, with more stories (maybe Beth/Daryl, Tyreese and the kids, the three newbies, etc.) in Episode 10? All guesses at this point.